Continuing Operation of a Magnetometer Array on the Greenland Ice Cap (MAGIC) to Investigate Propogating Ionospheric Current Systems

这项提议旨在格陵兰冰盖上一系列无人值守的自动磁数据收集平台的运作，以及这些数据的减少、分配和分析。我们建议，在经过简化和核实后，将魔术阵列的数据完全提供给那些要求它的人！格陵兰冰帽上的ıMAGIC=磁力计阵列！这个神奇的阵列与格陵兰海岸的磁力站相得益彰，用于调查小规模的电离层电流系统。这一阵列在格陵兰内陆的运作利用了在格陵兰首脑会议上为格陵兰冰盖计划II(GISPII)提供的既定后勤支持。因此，可以以很小的成本建立和维护这些站。这些地磁站形成一个二维阵列，站间距约为150公里。这些磁性测量的科学目标是调查小规模传播的磁扰动，它似乎是由与电离层相互作用的移动的丝状场向电流引起的。现在已经确定了这些系统的不同类别，场对齐电流的来源似乎是磁层边界层和磁层顶区域。为了解决这些当前系统的运动和结构演变，具有密集的二维阵列尤为重要。魔法站与现有的西海岸和东海岸格陵兰磁力仪以及将在加拿大部署的站相结合，使我们能够在足够的区域内观察这些现象，以确定它们的生成位置，并解决它们向尾部传播时的运动和空间演变。此外，魔术站和沿海站相对较高的时间分辨率(15-S数据)将允许进行受以前一分钟数据限制的调查。这一数据和拟议的研究对于理解太阳风到磁层和电离层的能量和动量耦合过程的物理学很重要。这项拟议的研究是密歇根大学、SRI国际和丹麦气象研究所共同努力的成果。

This proposal is directed toward the operation of an array of unattended, automatic magnetic data collection platforms on the Greenland ice cap and the reduction, distribution and analysis of these data. We propose to make the data from the MAGIC array, after reduction and verification, fully available to those who request it ıMAGIC = Magnetometer Arrary on the Greenland Ice Cap!. The MAGIC array compliments the magnetic stations on the coast of Greenland for the investigation of small-scale, ionospheric current systems. Operation of this array in the interior of Greenland takes advantage of the established logistical support for the Greenland Ice Sheet Program II (GISP II) at the Greenland summit. Thus, it is possible to establish and maintain these stations for a small cost. These magnetic stations form a two-dimensional array with station separation of about 150km. The scientific objective of these magnetic measurements is to investigate small-scale propagating magnetic disturbances which appear to result from moving filamentary field-aligned currents interacting with the ionosphere. Different classes of these systems have now been identified and the origin of the field-aligned currents appears to be the magnetospheric boundary layer and magnetopause region. It is particularly important to have a dense two-dimensional array in order to resolve the motion and structural evolution of these current systems. The MAGIC stations in combination with the existing west coast and east coast Greenland magnetometers and with stations to be deployed in Canada, permit us to observe these phenomena over a sufficient region as to identify their generation location and resolve their motion and spatial evolution as they propagate tailward. Further the comparatively high time resolution (15-s data) of the MAGIC and coastal stations will permit investigations which were limited by the one minute data previously available. This data and the proposed research is important to understanding the physics of the processes that couple energy and momentum from the solar wind to the magnetosphere and ionosphere. The proposed research is a collaborative effort between the University of Michigan, SRI International, and the Danish Meteorological Institute.